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(No Model.) 3 Sheets-Sheet 1 C. E. MOORE.

ORE REDUCING AND SEPARATINGMAGHINE. 1

No. 281,782. Patented July 24, 1883.

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(No Model.)

.0. E. MOORE. I ORE. REDUCING AND SEPARATING MAGHINE.

3 Sheets-Sheet 2.

Parte-nted July '24; 1883.

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O. E. MOORE,

ORE REDUCING AND SEPARATING MACHINE. No. 281,782. Patented July 24, 1883.

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UblITED STATES PATENT OFFICE.

CORTLAND E. MOORE, OF MARQUETTE, MICHIGAN, ASSIGNOR OF TIVO- THIRDS TO HENRY O. THURBER, OF SAME PLACE.

ORE REDUCING AND SEPARATING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 281,782, dated July 24, 1883.

Application filed February .24, 1883. (N0 model.)

To aZZ whom it may concern:

Be known that I, CORTLAND E. MOORE, a citizen of the United States, residing at Marquette, in the county of Marquette and State of Michigan, have invented certain new and useful Improvements in Ore Reducing and Separating Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to that class of ma chines which are designed for the purpose of separating the iron in ores known as magnetic from gangue or other nonmagnetic substances, which machines comprise, among other elements, one or more rolls magnetized, so that they act to attract and separate the magnetic particles of the ore from the nonmagnetic; and my invention consists in certain features hereinafter described, and specifically set forth in the claims.

Figure l is a side elevation, Fig. 2 a plan, Fig. 3 a central vertical section, and Figs. 4 to 7, inclusive, are details, of an ore reducing and separating machine constructed in accordance with my invention.

Like letters refer to like parts in all the figures.

In a suitable frame-work, as A, are sup ported a series of rolls arranged in pairs, the upper rolls, B B, constituting one pair, the middle rolls, C C, constituting a second pair, and the lower rolls, D D, constituting a third pair, each of which may be designated as the upper, middle, and lower rolls, respectively. I11 some instances it may be advantageous to employ additional pairs arranged above the upper rolls, and in others a less number of pairs than herein shown and described, so that I do not desire 'to limit myself to three pairs of rolls. These rolls are preferably constructed of chilled iron. The rolls B, O, and D' are supported in fixed bearings in the framework, while the rolls B, G, and D are supported in movable bearings a, which are adjustable toward or from the fixed bearings by means of the screws a. By this construction the rolls of each pair may be arranged with more or less space between them. A hopper, E, is secured upon the frame-work, and is designed to feed ore upon and into the bite of the upper rolls.

F represents a fixed bed extending from side to side of and secured to the frame-work by tie-boltsf.

At each end of the bed F is a roll, G, journaled in the frame, and about said rolls and along and upon the bed an endless apron, H, of leather, canvas, or other suitable material, is arranged.

At the rear end of the machine is an exhaust-fan, I, the mouth '5 of which is flared to cover the entire width of the machine, and extended to reach beyond the center and under the lower roll, D, while the lower portion of the mouth is removed, so that the passage into the case of the fan consists of or comprises the flared portion 13 in its top and sides and the endless belt G as or in its bottom. The discharge of the exhaust-fan is indicated as at i,- but, if desired, it may be in a common horizontal plane with the mouth or flared portion z. Scrapers or doctors J are provided for cleaning the rolls and apron as they revolve or operate.

At or near the front of the machine is a magnetic separating roll, K, supported in standards It, slotted for the movable boxes is, (see Fig. 6,) in which are secured glass bearings 76", in which the journals of the roll K revolve. A screw, k is employed at each side of the frame-work for the purpose of adjusting the roll K relative to the endless apron G. A delivery table or shelf, L, acts as a scraper against the roll K, and is inclined to deliver by gravity the matter removed therefrom.

In the ends of the journals of the roll K are screws 70*, (see Figs. 2 and 7,) about which wires M N are wound, one of said wires being connected with the positive pole and the other with the negative pole of a battery, 0, supported from and under the bed F. The magnetic roll K is cast hollow, and its periphery may be either smooth, as shown clearly in Fig. 2, or, as shown in Fig. 7, with a portion broken away, corrugated.

It is proper to remark that the corrugations are preferably rounded rather than sharp or A- shaped, as in the latter case the magnetism would naturally tend to concentration at and along the extreme edges of the A, whereas when rounded it is diffused more uniformly throughout the corrugations and throughout the entire periphery of the roll, as well as when the periphery is plain, as shown in Fig. 2; but in the plain roll other matter than magnetic is liable to adhere to the roll by cohesion, as when brought to it by the magnetic particles to which it adheres, or by actual and direct contact of the roll therewith. In the former instance the transfer of non-magnetic matter from the apron to the roll would occur when the latter is not in contact with the former or the ore thereon, while in the latter instance the roll and apron or ore is in contact. Therefore, to secure the most perfect separation possible with the apron and roll in or out of contact, it is requisite that the magnetism shall be uniformly distributed upon the roll, and the latter should be of such form as to in a measure act mechanically to sepa rate the particles. By using aplain roll adaptedto be adjusted above the ore upon the apron and maintaining a strong and uniform magnetism in or of the separating-roll, the magnetic particles are lifted bodily thereto, and none but adhering n on-magnetic p articles come in contact therewith. By using the corrugated roll depressed into or upon the ore, the current of electricity generating the magnet ism may be less strong, and by the aid of the mechanical action and contact of the corrugations in moving the particles against each other an equally perfect separation is accomplished, and, furthermore,with the corrugated roll elevated above the ore upon the apron the particles attracted'thereto recede into the grooves or corrugations, and thus as they aecumulate move upon each other, and in this movement act to mechanically remove the adherent non-magnetic particles, so that whether depressed or elevated the corrugated roll has advantages which are of especial value in operating upon very finelycomminuted ores. Nevertheless I do not desire to be understood as limiting myself to the use of either the plain or the corrugated roll; but I may use either separately or both jointly on one machine, and to aid in securing a repeated successive sepa-. rating function in the machine I may arrange a number of separating-rolls over the apron or aprons thereof, in order that as the ore progresses through the same and is partly cleansed by one roll the remaining partly-cleansed portion only may be operated 011 by another or v other rolls, as is customary in this class of machinery. The roll K may be magnetized by any of the usual well-known means, as an in sulated coil, m, located upon the shaft of the roll and connected to the wires M N.

In Figs. 4 and 5, I illustrate in end elevation and central horizontal section, respectively,

details of construction designed to retain the ore from escapement at the ends of the rolls. A flange or collar, 1?, is fitted to each end of the body of one roll (as C) of each pair and against which they abut become worn, they abuts against the ends of the other roll (as C) of the same pair. Brackets p are secured to the flange, and are seated in grooves formed lengthwise of and at the ends of the roll. The bases or the brackets are slotted for the recep tion of the bolts 1), by which they are secured in desired positions in the slots. By this con struction, as the flanges or the ends of the roll can be moved longitudinally upon the roll and again secured in place by the bolts.

It will be seen that one of the rolls (as C) is longer than the other that is, the workingface' of the roll (as 0) against which the flanges abut is shorter than that of the other roll, (as 6;) and to permit of the adjustment of the rolls toward each other, as hereinbefore described, theends of the short face-roll (as G) are turned down, as, at c, and to prevent the formation of a shoulder on the ends of said roll. by the constant action of the flanges said roll is an nularly recessed, as at 0. Each pair of rolls in the series may be provided with these means for the retention of ore at both ends.

The upper, middle, and lower sets of rolls may be of uniform size, and may be rotated (in the direction indicated by arrows) at uni form speeds; but I prefer to construct them of varied sizes, as shown in Fig. 1, and to op- 9 5 erate them at varied speeds of rotation, and yet without restriction in these matters. The upper rolls are thereforepreferably the largest and adjusted the farthest apart of any in the series; the lower rolls are preferably the smallest and adjusted the nearest to each other of any in the series; and the middle rolls are of medium size and adjustment relative to the upper and the lower rolls. As to speed of rotation, the upper are preferably the slowest, the lower the fastest, and the middle of medium relative speed.

Any desired train of gearing may be employed to operate the moving parts .of the machine, and I do not therefore limit myself I I0 in this particular, but illustrate one system adapted to the purpose.

On the shaft of the rear roll of the apron I mount a fixed and a loose pulley of usual con struction, and a gear, B, which meshes with a 1 15 large intermediate gear, S, that drives agear,

T, fixed to the shaft of the lower roll, D. A companion gear is fixed to the shaft of roll D. A small intermediate gear, U, is arranged to mesh with the gear T and a gear, V, fixed to the shaft of the roll 0, and a second small. intermediate gear, WV, meshes with the gear V and a gear, X, fixed to the shaft of roll B. Companion gears are fixed to the rolls B and O to mesh with the gears X and V,respectively. I 2 5 A belt, 8, extends from pulley S to the shaft of the exhaust-fan, and another belt, .9, connects the magnetic roll to the shaft of the front roll of the apron. Various modifications may be made in the details of construction in addition I 30 to those hereinbefore mentioned.

The glass bearings provided for the magnetic roll readily permit of the use of conductive material in the adjacent frame-work and journal-supporting devices, and serve to prevent the escape of the magnetism to other 5 portions of the machine, and as other nonconductive material so located would in like manner operate, I may substitute such for the glass bearings, but prefer glass, as it is also. adapted to withstand the friction of the j ournals of the rolls.

If desired, thcbattery need not be supported upon or by the machine, and it may even be dispensed with, and the roll in that case my be supplied with magnetism of any kind from I 5 any source of supply.

It is apparent that an ordinary exhaustproducing device may be substituted for that herein shown and described, and that it may be located either in front or rear of the crushing-rolls, and in either case the lower portion of the mouth thereof need not necessarily be re moved 5 but I prefer that shown and described.

The operation of the machine is as follows: Any of the magnetic ores is fed in suitable quantity and by any suitable means into the hopper E, and is crushed or broken into comparatively coarse particles in passing between the upper rolls, and it then falls upon the middle rolls, and the particles are further reduced and delivered upon the lower rolls, by which the ore is brought to the desired fineness,when it and its attending impurities fall toward the endless apron, when, by the action of the exhaust v produced by the fan, the lighter 3 5 particles are drawn from the heavier into and blown out of the fan. At this stage in the operation the finest portions of ore are diverted and drawn by the blast toward the fan, but ultimately fall upon the belt in rear of the heavier portions, falling simultaneously therewith, and thus by the construction of the mouth, as described, these finest portions are saved, and, with the coarser, are carried by the apron under the magnetic roll, when the magnetic portion is separated, as previously, de scribed, and delivered by the shelf or table into one receptacle, while the non-magnetic portions are delivered by the apron into any other suitable receptacle. Instead of the scrapers, revolving brushes may be employed, as usual, to operate against the apron or any of the rolls to clean the same.

The adjustable flanges on the crushing-rolls and a magnetic separating-roll having a cor- 5 5 rugated periphery and the necessary adjuncts of these features are. not herein claimed, but are reserved as the subj cots-matter of separate patents.

Having described my invention and its op- 60 eration, what I elaini is-- 1. An ore reducing andseparating machine, comprising a series of pairs of vertically arranged adjustable rolls of varied sizes, and means to operate them at various speeds of rotation, an endless apron, an exhaust-produc ing device located in rear of the rolls, and having the lower portion of its mouth removed to expose a portion of said apron, and a magnetic roll adjustably arranged above said apron, all substantially as and for the purpose set forth.

2 An ore reducing and separating machine comprising a series of rolls, as B B, C C, and D D, an endless apron, as G, and an exhaustproducing device, as I, having a bottomless flared mouth, as i, projecting above and over the apron and beneath the roll D, substantially as shown and described.

3. An oreredueing and separating machine comprising the rolls B B O O D D, the exhaust fan I, having the flared bottomless mouth a, apron G, roll K, wires M N, battery 0, delivery-shelf L, and means for the operation of the said rolls, apron, and fan, substantially as shown and described. 8 5

4. An ore reducing and separating machine comprising a series of crushing-rolls, an endless apron, and an intermediate exhaust, substantially as shown and described.

5. An ore reducing and separating machine comprising a series of crushing-rolls of varied sizes and means for rotating them at varied speeds, an endless apron, and an intermediate exhaust, substantia11y as specified.

6. An ore reducing and separating machine 5 comprisingaseries of crushing-rolls, an end less apron, and a magnetic separatingroll. substantially as specified.

7. An ore reducing and separating machine comprising a vertical series of pairs of crush- 10o ing-rolls, means to operate them at various speeds, means to adjust one to the other in each pair, an exhaust device arranged at a side of said series of pairs of rolls, an endless apron, and a magnetic roll arranged above said apron, 1o 5 substantially as specified.

8. An ore reducing and separating machine comprising an insulated magnetic separatingroll, an endless apron, an exhaust device having a flaring mouth located over said apron, 110 a series of crushing-rolls geared together and to the shaft of said apron, and belts connect ing said apron to the magnetic roll and to the exhaust device, substantially as specified.

In testimony whereof I afiix my signature in 1 I 5 presence of two witnesses.

CORTLAND E. MOORE.

\Vitnesses E. B. STOCKING, J. H. PAINE. 

